Charging device.



J. N. REESE.

CHARGING DEVICE.

APPLICATION FILED NOV- 29, 1915.

1,217,219. PtentedFel). 27,1917.

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J. N. REESE.

CHARGING DEVICE.

APPLICATION FILED NOV. 29. 1915.

1 ,217,21 9. Patented Feb. 27, 1917.

4 SHEETS-SHEET 2- J. N. REESE.

CHARGING DEVICE.

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J. N. REESE.

CHARGING DEVICE.

APPLICATION HLED uov zs, 1915.

Patented Feb. 27, 1917.

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JOHN NICHOLAS nEE sE, or irounesrown, OHIO.-

CHARGING DEVICE.

Specification of Letters Patent.

Patente'd Feb. 27, 1917.

Applicationfiled November-29, 1915. Serial No. 64,054

To all whom it may concern Be it known that I, JOHN NICHOLAS REESE, acitizen of the United States of America, residing at Youngstown,Mahoning county, Ohio, United States of America, have invented certainnew and useful Improvements in Charging Devices; andI do hereby declarethe following to be a full,

clear, and exact description of the invention, I

such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to letters or figures of reference marked thereon, which form a partof this specification.

My invention relates to blast furnace charging devices of the type inwhich a skip discharges into a distributing chute that delivers the skipload onto a charging bell of the furnace.

The chute is rotated from the skip, either when the skip ascends ordescends, or otherwise according to the requirements of the plant.

The object of my invention is to improve devices of this type and obtaina better and more accurate distribution of the charge on the bell.

To this end I change the angle of inclination of the chute, make thechute -V -shaped in section, and have the side walls converge toward thelower-discharge end, so that, no

matter'how large or how small a quantity of material is delivered to thechute by the skip, the material will be discharged onto the main belltoward a vertical axial plane through the chute for the particulardischarging position.

Another object is to automatically close the top of thehopper when themain bell is dropped to discharge the distributed skip loads into thefurnace, and this is preferably done from the bell beams. The chute isrotatable 1 beneath and independently of the closure.

Other details of construction will hereinafter be more particularlydescribed and claimed. V

In charging devices provided with chutes with which I have hadexperience, the: furnace has workedvery irregularly, and after aconsiderable time I came to the conclusion that the charging of thefurnace was not correct, as that part of the furnace opposite the skipreceived a considerably larger portion of every charge than that part ofthe furnace next to the skip. I also found that in nearly every case thecenter of gravity of the skip load when placed on the bell was not inthe position it was intended it should be.

The problem of remedying these defects was a diflicult one, especiallyas it was impossible to determine at once what was the initial cause ofthe variations.

I have discovered that the centers of gravity of the piles were toocloseto the hopper and that by placing them closer to the apex of the bellthis would overcome the irregular placing of the piles by lessening thedistance they could be displaced from their proper positions.

I also found that by converging the walls of the chute and making itV-shaped, the charge could be placed on the bell where intended. Theirregularity in the operation of the furnace was entirely overcome, andthere has been no trouble since.

In the accompanying drawings I have shown a structureembodying myinvention, and in said drawings Figure 1 is a vertical, central sectionof so much of a blast furnace top as is necessary to illustrate myinvention;

Fig. 2 isa plan view thereof.

Fig. 3'is a top View of the distributor chute. V

Fig. 4:. is a bottom view; thereof.

Fig. 5 is a sectional detail showing the manner of securing the chute tothe rotating ring or mouth portion.

Fig. 6 is a diagrammatic view showing the bell and hopper and the skipdischarging into the distributer.

The sheet metal casing or gas seal for the furnace is extended above thetop of the brick-work of the furnace and platform in a cone 1, as iscustomary with some furnace tops. The casing is supported by thecustomary structural iron frame work 2.

At the top of the cone 1 and surrounding the opening in its top is aring 3 on which slides a ring 4 forming the base of the chute mouth 5.The ring 4 is provided with a depending flange 4F and an internal seat4. The flange 4* holds the flaring, enlarged mouth 5 in position andprevents it from slipping off of ring 3 during rotation.

Bolted to the flange 'is the circular rack 6, by. which the chute isrotated,the mechanism for rotating it being that customarily used, towhich no claim of novelty is made by me.

Grease cups are distributed over ring 4, and supply grease to thecontacting surfaces of rings 3 and 4.

Carried by and resting on the seat 4 is the external flange of the chute9 held to the chute mouth 5 by means of pins 10, Fig. 5, engagingrecesses or notches 11. The chute tapers toward its lower end, Fig. 3,the sides 9 converging to form a V-shaped opening 12 that dischargesonto the bell Z) of the blast furnace.

As will be observed from the drawing, the upper end of the chute body 9has a conical entrance portion 0 that is supported in the conical mouth5. The bottom wall 13 of the chute is a continuation of the conicalentrance portion 0 and of the same shape. At the front, opposite therear wall 13, the conical entrance portion 0 joins a cylindrical portioncl, from which portion of the chute extends a tapering eccentricallyarranged elongation that is V-shaped in section and whose fiat sides 9produce a cross section whose area diminishes toward the smallerV-shaped lower end 12.

The angle of the axis of the chute to which the bottom wall 13 issubstantially parallel, has been increased from 45 to about 63, so as tomake a steeper incline, this incline being determined by the position ofthe apex of the bell and the crosshead supporting the bell.

The chute is caused to rotate after each discharge of the skip 8,usually during the descent of the skip through an angle of about 86 3830", and after four or eight skip loads have been deposited the bell islowered to discharge into the furnace.

The bell is lowered by the bell beams 14 pivoted at 14 Each beam has arod 15 depending therefrom, which rod passes through the casing 1 andboth rods are connected to a cross head 16 beneath the chute 9, from themiddle of which cross head the bell is suspended. The distance betweenthe two rods 15 is sufficient to permit the rotation of the chute underall conditions of operation.

Over the chute is a stationary sheet metal cover 17 having an openingtherein closed by a door 18 mounted on hinges 19 011 the cover 17.Extending across and mounted on the door is a beam 20. The ends of thisbeam 20 extend beyond the sides of the cover 17 into the path of thebell beams 14, and carry anti-friction rollers 21.

The ends of the bell beams 14 are pro vided with cams 22 arranged toengage the rollers 21 when the bell is raised to close the hopper.

The operation is as follows:

l/Vhen the bell is raised the cams 22 on the ends of the bell beams 14engage the rollers 21 and raise the door 18. The skip ascends and dumpsits charge into the chute mouth 5, and by gravity it descends onto thebell. If the chute is positioned so that its bottom wall 18 is in linewith or parallel to the skip bottom when in discharging posi tion, 2'.6., 180 from the position shown in Fig. 6, the skip charge passesthrough the chute in a straight line, the converging sides of the chuteand its V-shape causing the charge to compact or hold together andneatly deposit itself in a pile on the bell with its center of gravityin the vertical axial plane of the chute. I

Should the chute be directed transverse to the line of discharge of theskip, the charge will be deposited on or toward the far wall of thechute, and in descending the converging chute walls and V-shaped crosssection will compel the charge to deposit on the bell in the verticalaxial plane of-the chute, instead of to one side thereof, which has beenthe trouble with chutes of other shape.

I claim- 1. In a blast furnace charging device having a hopper and acooperating bell, the combination with the bell and hopper thereof, of achute rotatably mounted above said bell and hopper and arranged todischarge thereon, said chute having an enlarged mouth located centrallyof said bell and hopper, and a smaller, eccentrically arranged V-shapeddischarge end, the sides of said chute converging to said smaller endand the bottom wall of said chute making an angle of approximatelysixty-three degrees with a horizontal.

2. In a blast furnace charging device having a hopper and itscooperating bell, the combination with the bell and hopper thereof; of achute having a mouth arranged centrally with respect to said bell andhopper and having a prolongation rigid therewith and extendingeccentrically therefrom and having a V-shaped discharge end dischargingonto said bell.

3. The combination with a blast furnace,

the cover and the charging bell; of a rotatable chute mounted above saidbell having a centrally arranged mouth and a downwardly projectingdischarging portion rigid therewith and tapering to a V-shapedcontracted end eccentric to said cover.-

4:. In a blast furnace charging device, the combination with a cover, ahinged charging door on the cover; of bell beams, and means to permitthe automatic opening and closing of said door by the action of saidbeams on a part of the door.

5. In a blast furnace charging device, the combination with a rotatablecharge directing chute; of a stationary cover therefor, a hinged door onthe cover, bell beams, cams on said beams, and rollers on said doorarranged for engagement by said cams when the beams are operated.

6. In a blast furnace charging device, the combination with the blastfurnace and its charging bell; of a rotatable chute above said bell fordischarging a partial charge onto the bell and having an inclination ofapproximately sixty-three degrees with a horizontal. V

7. In a blast furnace charging device, the combination With a cover, ahinged charging door on the cover and bell beams operating as cams tocam the door to open position when their bell is raised.

8. In a blast furnace charging device, the combination with the chargingbell of said device; of a rotary chute arranged above said bell andhaving a circular conical mouth and an inclined body Whose bottomextends from said mouth to a contracted V shaped end, the slope of saidbottom being substantially a straight continuation of the line of slopeof said body.

9, A removable chute'body having a circular conical. entrance portionand an cecentric elongation V-shaped in cross-section, thecross-sectional area of which decreases toward its discharge end.

10. A removable chute for blast furnace tops having a circular, conical,substantially horizontally disposed mouth merging into a tapering,downwardly inclined straight extension having substantially plane Wallsat its contracted discharge end at an angle to one another to form a V-shaped discharge opening eccentric to said mouth.

11. In a blast furnace charging device, the combination With a cover,and a hinged charging door on the cover; of pivoted bell beams Whosebell supporting ends engage the door to open and close it.

12. In a blast furnace charging device, a circular conical mouth havingmeans for cletachably securing it to a furnade top, a chute body havinga conical entrance portion seated in said mouth and provided with aneccentric elongated V-shaped extension of the same inclination as theentrance portion.

In testimony that I claim the foregoing as my invention, I have signedmy name in presence of tWo subscribing Witnesses.

7 JOHN NICHOLAS REESE.

Witnesses:

H. H. WICKHAM, MARGUERITE N. GULINsKI.

Goples of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

